A pull-out step ladder

Abstract

The utility model relates to a kind of pull type pedal ladder, it includes fixed ladder, movable ladder, special-shaped pin shaft, lock hook, round pin shaft and magnet;Movable ladder is slidably connected with the opposite inner side of the two vertical rods of fixed ladder along the up-down direction, vertical sliding slot is respectively penetrated in the middle section of the two vertical rods of fixed ladder, one special-shaped pin shaft is slidably connected in each sliding slot respectively, the top of the corresponding vertical rod of movable ladder is respectively fixedly connected with each special-shaped pin shaft end portion by sliding slot passing;Lock hook is hinged on the opposite outer side of the two vertical rods of movable ladder by round pin shaft respectively, magnet is provided on the vertical rod of movable ladder below lock hook side, round pin shaft, when lock hook rotates to bend hook downward, lock hook is attracted and fixed on the magnet on the vertical rod side of movable ladder;When movable ladder is retracted to fixed ladder, the bend hook of lock hook is just buckled on the cross bar of fixed ladder.

Description

Technical Field

[0001] This utility model relates to the field of bicycle ladder technology, specifically to a pull-out bicycle ladder. Background Technology

[0002] The cargo boxes of transport vehicles are quite high off the ground, making it extremely difficult for staff to climb in and out to inspect the goods. The current solution is for staff to first lift and attach the ladder to the cargo box, and then remove the ladder after the goods inspection is completed.

[0003] When transport vehicles are parked in small garages, narrow loading and unloading platforms, or other areas with limited lateral space, there are only narrow lateral gaps on both sides of the vehicle body. Conventional trolley ladders need to maintain a suitable tilt angle during use to ensure the stability of the operation after the cargo boxes are stacked. This requires a high level of lateral space, making it difficult for workers to move and set up the trolley ladder in the narrow lateral gaps, and making it inconvenient to load and unload cargo boxes.

[0004] Currently, there are many types of trailer-type step ladders. For example, Chinese patent CN215706006U discloses a hidden folding step ladder. However, it also has the following drawbacks: the folding step ladder has a large span when unfolded, which is not suitable for narrow spaces. Utility Model Content

[0005] The purpose of this utility model is to provide a pull-out bicycle ladder.

[0006] The purpose of this utility model is achieved by the following technical solution: a pull-out bicycle ladder, which includes a fixed ladder, a movable ladder, a special-shaped pin, a locking hook, a circular pin, and a magnet; The movable ladder is slidably connected to the inner sides of the two vertical bars of the fixed ladder in a vertical direction. Vertical grooves are formed through the middle sections of the two vertical bars of the fixed ladder, and a shaped pin is slidably connected in each groove. The end of each shaped pin passes through the groove and is fixedly connected to the top of the corresponding vertical bar of the movable ladder. Locking hooks are hinged to the outer sides of the two vertical bars of the movable ladder via circular pins. A magnet is provided on the vertical bar of the movable ladder below the circular pin on one side of the locking hook. When the locking hook rotates to a downward-facing position, it engages with the magnet on the side of the vertical bar of the movable ladder. When the movable ladder retracts upwards into the fixed ladder, the hook of the locking hook engages with the crossbar of the fixed ladder.

[0007] Preferably, one end of each of the circular pins is fixed to the corresponding vertical rod of the movable ladder, and the other end is vertically fixed to the rod of the locking hook, with the rod of the locking hook rotatably sleeved on the circular pin.

[0008] Preferably, a vertical limiting slide is provided on the inner side of the two vertical rods of the fixed ladder, located below the slide groove, and the two vertical rods of the movable ladder are slidably placed in the limiting slide.

[0009] The advantages of this utility model are as follows: First, this utility model has a movable ladder that slides vertically to the inner sides of the two vertical bars of the fixed ladder. When folded, the movable ladder occupies little space and is easy to install and fix to the bottom of the outer wall of the cargo box. The movable ladder unfolds vertically and has no lateral span, making it suitable for areas with narrow spaces. Secondly, this utility model is equipped with a locking hook and a magnet. When the locking hook is rotated to the point where the hook is facing down, the locking hook is attracted and fixed to the side of the vertical rod of the movable ladder by the magnet set on the vertical rod of the movable ladder. During the process of pulling the movable ladder out, the locking hook is prevented from swinging randomly and affecting the up and down sliding of the movable ladder relative to the fixed ladder. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 yes Figure 1 Top view.

[0013] Figure 3 yes Figure 1 AA sectional view.

[0014] Figure 4 yes Figure 1 BB cross-sectional view.

[0015] Figure 5 yes Figure 1 CC section view.

[0016] Figure 6 yes Figure 1 DD sectional view.

[0017] Figure 7 This is a schematic diagram of the movable ladder after it has been unfolded.

[0018] Figure 8 This is a structural diagram of an irregularly shaped pin.

[0019] The components in the attached diagram are labeled as follows: fixed ladder 1, slide 1.1, movable ladder 2, irregular pin 3, locking hook 4, circular pin 5, magnet 6, limiting slide 7. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figures 1-8 As shown, a pull-out treadmill ladder includes a fixed ladder 1, a movable ladder 2, a special-shaped pin 3, a locking hook 4, a circular pin 5, and a magnet 6. A movable ladder 2 is slidably connected to the inner sides of the two vertical bars of the fixed ladder 1 in the vertical direction. When folded, the movable ladder 2 occupies little space and is easy to install and fix on the bottom of the outer wall of the cargo box. The movable ladder 2 unfolds vertically and has no lateral span, making it suitable for areas with narrow spaces. The connection method is as follows: vertical grooves 1.1 are respectively opened through the middle section of the two vertical bars of the fixed ladder 1. A special-shaped pin 3 is slidably connected in each groove 1.1. The end of each special-shaped pin 3 passes through the groove 1.1 and is fixedly connected to the top of the corresponding vertical bar of the movable ladder 2. The special-shaped pin 3 is set to connect the fixed ladder 1 and the movable ladder 2. The groove 1.1 is set to facilitate the vertical movement of the special-shaped pin 3, so as to realize the vertical movement of the movable ladder 2 relative to the fixed ladder 1, which facilitates the folding and unfolding of the movable ladder 2. Locking hooks 4 are hinged to the opposite outer surfaces of the two vertical bars of the movable ladder 2 via circular pins 5. Specifically, one end of each circular pin 5 is fixed to the corresponding vertical bar of the movable ladder 2, and the other end is perpendicularly fixed to the rod of the locking hook 4. The rod of the locking hook 4 is rotated and sleeved on the circular pin 5. A magnet 6 is provided on the vertical bar of the movable ladder 2 below the circular pin 5 on one side of the locking hook 4. When the locking hook 4 is rotated to the point where the hook faces down, the locking hook 4 is attracted and fixed to the side of the vertical bar of the movable ladder 2 by the magnet 6 provided on the vertical bar of the movable ladder 2. During the pulling process of the movable ladder 2, the locking hook 4 is prevented from swinging arbitrarily and affecting the vertical sliding of the movable ladder 2 relative to the fixed ladder 1. When the movable ladder 2 is retracted upward into the fixed ladder 1, the hook of the locking hook 4 is just engaged with the horizontal bar of the fixed ladder 1. When the movable ladder 2 extends downward, the hook of the locking hook 4 is attracted to the magnet 6. A vertical limiting slide 7 is provided on the inner side of the two vertical rods of the fixed ladder 1, located below the slide groove 1.1. The two vertical rods of the movable ladder 2 are slidably placed in the limiting slide 7, which provides guidance for the up and down movement of the movable ladder 2, facilitates the folding and unfolding of the movable ladder 2, and when the movable ladder 2 is fully extended, the two vertical rods of the movable ladder 2 are located in the limiting slide 7, preventing the movable ladder 2 from swaying back and forth due to force.

[0023] Usage: When the trolley ladder is in the retracted state, the operator first pushes the movable ladder 2 upwards, causing all the locking hooks 4 to disengage from the crossbar of the fixed ladder 1. Then, rotate all the locking hooks 4 backwards, so that the hook of each locking hook 4 is attracted to the corresponding magnet 6. Next, pull the movable ladder 2 downwards, causing the special-shaped pin 3 to move down in the slide groove 1.1, so that the movable ladder 2 moves down relative to the fixed ladder 1 until the movable ladder 2 is fully extended. Then, after the operator enters the cargo box through the trolley ladder to inspect the goods, the cargo box door is closed. The operator pushes the movable ladder 2 upwards, causing the special-shaped pin 3 to move up in the slide groove 1.1, driving the movable ladder 2 to fully retract behind the fixed ladder 1. Finally, the operator continues to push the movable ladder 2 upwards until the hook of each locking hook 4 can be engaged with the corresponding crossbar of the fixed ladder 1 after rotation, thus completing the retraction of the movable ladder 2.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pull-out bicycle ladder, characterized in that, It includes fixed ladders, movable ladders, irregular pins, locking hooks, round pins, and magnets; The movable ladder is slidably connected to the inner sides of the two vertical bars of the fixed ladder in a vertical direction. Vertical grooves are formed through the middle sections of the two vertical bars of the fixed ladder, and a shaped pin is slidably connected in each groove. The end of each shaped pin passes through the groove and is fixedly connected to the top of the corresponding vertical bar of the movable ladder. Locking hooks are hinged to the outer sides of the two vertical bars of the movable ladder via circular pins. A magnet is provided on the vertical bar of the movable ladder below the circular pin on one side of the locking hook. When the locking hook rotates to a downward-facing position, it engages with the magnet on the side of the vertical bar of the movable ladder. When the movable ladder retracts upwards into the fixed ladder, the hook of the locking hook engages with the crossbar of the fixed ladder.

2. A pull-out treadmill ladder according to claim 1, characterized in that, One end of each of the circular pins is respectively threaded and fixed on the corresponding vertical rod of the movable ladder, and the other end is vertically threaded on the rod of the locking hook. The rod of the locking hook is rotatably sleeved on the circular pin.

3. A pull-out treadmill ladder according to claim 1, characterized in that, A vertical limiting slide is provided on the inner side of the two vertical rods of the fixed ladder, located below the slide groove, and the two vertical rods of the movable ladder are slidably placed in the limiting slide.

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